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Patentes

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Número de publicaciónUS6503002 B1
Tipo de publicaciónConcesión
Número de solicitudUS 09/487,967
Fecha de publicación7 Ene 2003
Fecha de presentación18 Ene 2000
Fecha de prioridad5 Dic 1996
TarifaCaducada
También publicado comoCN1231098A, EP0944998A1, EP0944998A4, US6069714, WO1998025399A1
Número de publicación09487967, 487967, US 6503002 B1, US 6503002B1, US-B1-6503002, US6503002 B1, US6503002B1
InventoresAlbert D. Edgar
Cesionario originalApplied Science Fiction, Inc.
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Method and apparatus for reducing noise in electronic film development
US 6503002 B1
Resumen
In electronic film development, a film is scanned, using light, multiple times during development. The light is reflected from an emulsion containing milky undeveloped silver halide embedded with developing grains. The undeveloped halide layer has a finite depth over which photons from a light source scatter backward. This depth is within the range of the coherency length of infrared sources commonly used in electronic film development, causing coherency speckle noise in the scanned image. A prescan made after the emulsion swells, but before the silver grains develop, normalizes subsequent scans, pixel by pixel, to cancel coherency speckle and other defects.
Imágenes(4)
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Reclamaciones(17)
What is claimed is:
1. An electronic film processing system capable of processing a film image, wherein the film image has at least one emulsion layer having at least one noise effect, comprising:
an applicator capable of applying at least one solution to the film image;
at least one scanner capable of scanning the film image to form a first scan image and at least one second scan image; and
a computer capable of combining the first scan image with the at least one second scan image to form a digital image with the at least one noise effect decreased.
2. The system of claim 1 wherein the at least one solution is capable of initiating expansion of the emulsion layer.
3. The system of claim 1 wherein the at least one solution comprises a developing agent.
4. The system of claim 1 wherein the at least one solution has an alkaline pH.
5. The system of claim 1 wherein the first scan image is a scan of the film image in an expanded, undeveloped condition.
6. The system of claim 1 wherein each second scan image is a scan of the film image in an expanded, at least partially developed condition.
7. The system of claim 1 wherein each scanner comprises a CCD-array image detector.
8. The system of claim 1 wherein each scanner comprises a light source capable of projecting linear light beam of uniform, diffuse illumination.
9. A film scanning station apparatus for forming at least one digital image from a film image, wherein the film image has at least one emulsion layer with at least one noise effect in the at least one emulsion layer, the apparatus comprising:
at least one bath filled with at least one solution;
a first scanner capable of scanning the film image to form a first scan image;
at least one second scanner capable of scanning the film image to form at least one second scan image;
a transporter capable of moving the film image through each bath and each scanner;
a computer capable of receiving pixel values from the first scan image and the at least one second scan image and capable of combining the pixel values to form a digital image with at least one noise effect decreased.
10. The apparatus of claim 9 wherein the at least one bath has a solution that comprises an expanding agent.
11. The apparatus of claim 9 wherein the at least one bath has a solution that comprises a developing agent.
12. The apparatus of claim 9 wherein the at least one solution has an alkaline pH level.
13. The apparatus of claim 9 wherein the first scan image is a scan of the film image in an expanded, undeveloped condition.
14. The apparatus of claim 9 wherein each second scan image is a scan of the film image in an expanded, at least partially developed condition.
15. The apparatus of claim 9 wherein at least one of the at least one second scan image is a scan of the film image in an expanded, fully developed condition.
16. The apparatus of claim 9 wherein each scanner comprises a CCD-array image detector.
17. The apparatus of claim 9 wherein each scanner comprises a light source capable of projecting linear light beam of uniform, diffuse illumination.
Descripción
RELATED APPLICATION

This application is a continuation application of Ser. No. 08/979,038 filed Nov. 26, 1997, U.S. Pat. No. 6,069,714 which claims the benefit of U.S. Provisional Application No. 60/032,114, filed Dec. 5, 1996.

FIELD OF THE INVENTION

This invention generally relates to the electronic development of film and more particularly to a method and apparatus for reducing noise in electronic film development.

BACKGROUND OF THE INVENTION

Electronic film development, also known as digital development, is a method of digitizing color film during the development process as disclosed in U.S. Pat. No. 5,519,510 issued to the present inventor. Conversion of analog images into digital data, or scanning, has become widespread for a variety of uses, including storing, manipulating, transmitting, displaying or printing copies of the images.

In order to convert a photographic image into a digital image, the film image frame is transported through a film scanning station, and illuminated along each scan line with a linear light beam of uniform, diffuse illumination, typically produced by a light integrating cavity or integrator. The light transmitted through the illuminated scan line of the image frame is focused by a lens system on a CCD-array image detector which typically produces three primary color light intensity signals for each image pixel. These light intensity signals are then digitized and stored. Film scanners which enable the electronic development of film have a variety of forms today and the common aspects of film image frame digitizing, particularly line illumination and linear CCD array based digitizers, are described in greater detail in U.S. Pat. No. 5,155,596.

In electronic film development, the developing film is scanned at a certain time interval(s) using infrared light so as not to fog the developing film, and also to increase penetration of the light through any antihalation layers. Some of the incident light is reflected from an emulsion on the film which contains milky, undeveloped silver halide. The undeveloped halide emulsion has a finite depth over which the photons from the light source will scatter and reflect back toward a detector. This depth is within the range of the coherency length of infrared light sources commonly in use in electronic film development today. It is this finite reflective depth which causes noise in the scanned image due to coherency speckle. Noise in the scanned image results in capturing an image distorted by graininess.

Because of the longer wavelength of infrared light, both the wavelength and the dividing fractional bandwidth for a fixed bandwidth contributes to a longer coherency length than normally encountered in visible light. In addition, the width of the milky silver halide layers is very thin in electronic film development, reducing the coherency length necessary to produce interference speckle.

Furthermore, the image seen through the back side of the film is very faint, so any coherency speckle is amplified as the faint image is amplified and the image is distorted. This problem is apparent in scans of the film regardless of whether light is reflected from the top or bottom of the film, or is transmitted through the film. However, it is predominant in the rear reflection scan due to the increased light reflected by the antihalation layer. No prior art methods appear to address this significant problem. Generally, during film processing, the dry emulsion layer over the film substrate is subjected to an aqueous bath which causes the emulsion to expand. During electronic film processing, photons penetrating the emulsion strike particles suspended in the emulsion and reemerge to be registered by light sensors. As the emulsion expands, the distance between the photon reflecting particles varies proportionally. If the resulting difference between the photons' exit paths is a quarter wavelength difference, then a speckle point can change from black to white or from white to black. Thus, any attempt to remove the speckle effect by differencing images made while the emulsion is in a first expanded position and a subsequent second expanded position can actually make the speckle effect worse by overlaying two different speckle patterns. For these reasons, coherency speckle is a significant problem in practicing electronic film development.

To view coherent speckle with the human eye, the path length traveled by the light can be no more than the coherency length of the light source. Beyond the coherency length, the speckle shimmers at the speed of light and appears to the viewer to be continuous. The characteristic grainy, or speckled, appearance of laser light, which is a coherent light source, is due to interference effects which result from coherence. Under laser light, everything in a room appears speckled, and the speckles appear to shimmer as the light, object, or viewer move.

Even under ordinary light, speckle is sometimes seen when there are very short path differences and very narrow light angles involved, as for example when viewing a white sheet of paper in direct sunlight. For noncoherent light, the coherency length is on the order of the wavelength divided by the percent bandwidth. Because this usually amounts only to a few wavelengths of light, coherency shimmer is not normally visible in real world viewing where noncoherent light is the norm.

It is, therefore, an object of this invention to provide a method of electronic film development which significantly reduces noise in capturing a developed or developing image.

It is another object of this invention to provide a method of electronic film development which significantly reduces or entirely eliminates coherent speckle in a developed image.

It is yet another object of the present invention to eliminate noise caused by coherent speckle during electronic film development which is altered by emulsion expansion.

To achieve these and other objects which will become readily apparent upon reading the attached disclosure and appended claims, an improved method of electronic film development which significantly reduces the amount of coherent speckle noise in an image is provided. Additional objects, advantages, and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

SUMMARY OF THE INVENTION

According to the present invention, the foregoing and other objects and advantages are attained by an electronic film development method and apparatus by which coherency speckle and other defects are reduced to render commercially viable images. The method and apparatus for reducing noise in electronic film development of a substrate bearing a latent image includes applying a chemical solution to a film substrate to expand the substrate a predetermined amount; allowing the substrate to substantially expand to the predetermined amount; scanning the substrate to generate a first scan of the substrate image; inducing development of the substrate; scanning the substrate after development to generate a second scan; and generating an image with reduced noise from the first and second scan information.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of a film layer structure being exposed to light in which the method of this invention can be applied.

FIG. 2 is a cross-sectional view illustrating coherency speckle in a film layer structure.

FIG. 3A is a cross-sectional view of a film layer undergoing electronic film development before emulsion expansion.

FIG. 3B is a cross-sectional view of a film layer undergoing electronic film development after emulsion expansion.

FIG. 4 is a graph showing the relationship of emulsion expansion over time upon application of a neutral and alkaline solution.

FIG. 5 is a graph representing the relationship of application of developer and emulsion development over time.

DETAILED DESCRIPTION OF THE INVENTION

The invention will now be described in more detail with reference to the various related figures. In the figures, the invention is presented in connection with conventional color film having at least three different layers. FIG. 1 is a representation of how each of three layers of a film 101, sensitive to red, green and blue respectively, are viewed when exposed to light. When the developing film is viewed from the top during development, the top layer is seen clearly while the lower layers are substantially occluded by the opacity of the top layer. Viewed from the rear during development, the back layer is seen while the other layers are mostly occluded. Finally, when viewed by light transmitted through the film, the fraction of light that does penetrate all three layers is modulated by all three layers, and so contains a view of all three layers. More specifically, as a light source 100 at the front 102 of the film 101 transmits light 104 through the various layers of the film 101, a viewer 105 from the front 102 of the film 101 primarily sees light 106 reflected from the blue sensitive layer 108 with some of the light 110 transmitting through all of the layers to be ultimately viewed by viewer 112 from the back 113 of the film 101. When a light source 114 at the back 113 of the film 101 transmits light 115 through the layers, the viewer 116 sees light 118 reflected from primarily the red sensitive layer 120. The viewer 116 also detects a reflection 122 from the antihalation layer 124 which includes coherency speckle. This coherency speckle becomes image-related noise which the present invention reduces. Because of the additional light 122 reflected by the antihalation layer 124, coherency speckle is worse for the rear reflection image; however, coherency speckle also contaminates the front reflection and transmitted images. Thus, its elimination will improve all three images seen by viewers 105, 112, and 116.

FIG. 2 illustrates the phenomenon of coherency speckle in more detail in the context of the present invention. A typical light source 202 emits two photons along paths 204 and 206. These photons penetrate into a milky diffuser 208, such as a silver halide emulsion, deposited on a substrate 210. Depending on the degree of opacity, photons will penetrate a random distance into the diffuser 208 before they hit a particle and are reflected back. The photon of light traveling along path 204 is shown striking particle 212 and reemerging along path 214. The photon along path 206 strikes particle 216 and reemerges along path 218. In the illustrated case, both paths 214 and 218 reconverge on a viewer 220.

When the light source 202 is a source of coherent light such as a laser, the photons emitted along paths 204 and 206 are coherent in that they are in phase with one another along the wavefront of the light. Assuming that the two particles 212 and 216 are so close together so as to appear overlapping at a single point when detected by viewer 220, the two photons may interfere with each other at the viewer 220, like ocean waves merging from different angles. In particular, if the total length of the two traversal paths 204-214 and 206-218 differ from each other by an integer multiple of the wavelength of the coherent light emitted by source 202, then the photons will constructively interfere with each other at viewer 220. Thus, their electric vectors will add to produce twice the electric field, and four times the power. If, on the other hand, the path lengths differ by an integer multiple and a half of the light source wavelength, the two photons will interfere destructively, meaning the electric vectors will cancel and produce no light at the viewer 220. The effect of this phenomenon over a film surface area which is large relative to the light source wavelength is that on average two coherent photons will produce twice the average power of a single photon. However, the point detected by viewer 220 corresponding to the image particles 212 and 216 may either appear very bright or completely black depending on the degree of interference in the reflected light. This effect is known as coherent speckle and it introduces noise in current methods of electronic film development.

Reference is now made to FIGS. 3A and 3B for a description of a related speckle problem unique to electronic film development. During film processing in general, the dry emulsion layer 308 over the film 300 is subjected to an aqueous bath which causes the emulsion 308 to expand. Referring now to FIG. 3A, a light source 302 emits two photons along paths 304 and 306. The photons penetrate into the dry emulsion 308. The photon traveling along path 304 is seen striking particle 312 located within the emulsion 308 and reemerging along path 314. Similarly, the photon along path 306 strikes particle 316 in the emulsion 308 and reemerges along path 318. In the illustrated case, both paths 314 and 318 reconverge on a viewer 321. FIG. 3B represents the expanded emulsion 320 after it has been subjected to an aqueous bath. As in FIG. 3A, a light source 302 emits two photons along paths 305 and 307. The photons penetrate the expanded emulsion 320. The photon along path 305 is seen to strike particle 312 and reemerge along path 322, and the photon along path 307 strikes particle 316 and reemerges along path 324. Both paths 322 and 324 reconverge on a viewer 321. Because of the expansion of the emulsion 320, the distance between the photon reflecting particles 312 and 316 has also expanded proportional to the expansion of the emulsion 320. This causes the difference in path length between total path 304-314 of the first proton and the total path 306-318 traveled by the second proton within emulsion 308 to increase to the greater difference between paths 304-322 and 306-324 in the expanded emulsion 320. If the difference in distance between the particles 312 and 316 is only a quarter wavelength (less than one four-thousandths of a millimeter in a typical application using infrared light), then a speckle point can completely change from black to white, or from white to black. Thus, any attempt to remove the speckle effect by differencing an image made with the pre-expanded emulsion 308 from the image made with the expanded emulsion 320 can actually make the speckle effect worse by overlaying two different speckle patterns.

The present invention reduces the amount of coherency speckle detected by electronic film development by scanning a substrate bearing a latent image after the emulsion has expanded to its final thickness but before development has begun, and differencing that scan from the resultant post-development scan.

First, a solution is applied to the emulsion to initiate its full expansion. FIG. 4 depicts the emulsion thickness which may contribute to the speckle effect, and the relationship between application of both a non-alkaline pH solution (for example, a neutral solution with a pH factor of 7.0 or less, e.g., that of water) and an alkaline pH solution (pH above 7.0) to emulsion and emulsion thickness. Upon application of a neutral pH solution at time 402, the transit time period 403 begins. The transit time represents the time it takes for the aqueous solution to be absorbed by the front layers of the emulsion prior to reaching the rear layer as seen by the back of the film. Once the liquid reaches the rear of the film, expansion of the film begins at time 407. The emulsion will continue to expand until it has reached its terminal thickness 405 at time 408. At time 408, the emulsion is saturated and will no longer expand.

As illustrated by the graph, the emulsion thickness will vary depending on the pH of the applied emulsion-expanding solution. Upon application of an alkaline pH solution at time 402, the expansion of the emulsion begins until it reaches its terminal thickness 406 at time 408. According to the present invention, it is after time 408 when the terminal thickness of the emulsion has been reached, but before development has begun, that the prescan of the substrate is optimum for minimizing or eliminating coherent speckle.

One suitable solution for expanding the emulsion is a developer which contains no developing agent. Staple types of developers include HC-110 manufactured by Eastman Kodak of Rochester, N.Y. diluted to a 1:7 ratio. Alternatively, the emulsion-expanding solution could be an activating agent which enables the developing agent to work by elevating the pH of the solution to alkalinity. Typical alkaline activators dissolved in aqueous carriers include but are not limited to sodium sulfite and sodium carbonate.

In another embodiment of the invention, a developer containing a developing agent is applied to the film emulsion. The developing agent reduces silver halide crystals containing latent image centers. Suitable developing agents include but are not limited to Elon, phenidone, and hydroquinone dissolved in an aqueous carrier and are commonly manufactured by Eastman Kodak, Agfa, and others. In this case, the prescan must be done upon the emulsion reaching its final expansion but before the beginning of substantial development. FIG. 5 represents the time relationship between application of the developer and development of the emulsion. Upon developer application at time 502, there is a specific time period, called the induction time 504, before development of the film begins at inertia point 506. As the induction time proceeds, the optical density of the emulsion increases. There may be a time during which the emulsion expansion and film development phases overlap. In this embodiment, the prescan is optimally performed before the end of the induction time 504 but after the emulsion has substantially expanded. A prescan taken at this point represents the final coherency speckle pattern devoid of unwanted reduced silver halide grains.

If the solution applied to the emulsion is a developer with a developing agent, development begins immediately after the inertia point of the developing agent is reached. If the solution applied to the emulsion did not contain a developing agent, then there is an arbitrarily long time after the film has expanded during which the scan may be made. Once the developing agent is added to the solution on the film, the induction time 504 begins to run. After development has begun, a plurality of scans are performed at spaced time intervals. These scans are then combined into a single post-development scan as is already known in the electronic film development art. The present invention takes the post-development scan containing image and speckle information and differences it pixel by pixel from the prescan information which contains the speckle pattern without the image. During the differencing procedure, a first image and a second image are received in a computer as pixels. Each pixel has a numerical value representing a characteristic, such as luminance, of the substrate corresponding to that pixel. The corresponding pixel information in the first image and second image are combined to create pixel values which will generate a third image in which the speckle pattern has been decreased or entirely eliminated. The combining function may consist of any of a number of mathematical steps or combination of steps including, but not limited to, dividing and subtracting. As a result of combining the first and second images in the present invention, the speckle pattern will be nulled out or significantly reduced.

In general two-component film development, a non-alkaline solution comprising a developing agent is typically applied first, then an alkaline activator is applied subsequently. However, there are situations in which a better result may be obtained if the order in which the agents are applied is reversed or if both developer and activator agents are applied in a single solution that comprises both developer agents and activator agents. The combined solution approach is more common in the art of film development.

While this invention has been described with an emphasis upon certain preferred embodiments, variations in the preferred composition and method may be used and the embodiments may be practiced otherwise than as specifically described herein. Accordingly, the invention as defined by the following claims includes all modifications encompassed within the spirit and scope thereof.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US24041386 Oct 194116 Jul 1946Mayer Alvin LApparatus for developing exposed photographic prints
US352068915 Jun 196614 Jul 1970Fuji Photo Film Co LtdColor developing process utilizing pyridinium salts
US352069024 Jun 196614 Jul 1970Fuji Photo Film Co LtdProcess for controlling dye gradation in color photographic element
US358743524 Abr 196928 Jun 1971Chioffe Pat PFilm processing machine
US361547927 May 196826 Oct 1971Itek CorpAutomatic film processing method and apparatus therefor
US361549829 Jul 196826 Oct 1971Fuji Photo Film Co LtdColor developers containing substituted nbenzyl-p-aminophenol competing developing agents
US361728218 May 19702 Nov 1971Eastman Kodak CoNucleating agents for photographic reversal processes
US374712010 Ene 197217 Jul 1973N StemmeArrangement of writing mechanisms for writing on paper with a coloredliquid
US38331617 Feb 19733 Sep 1974Bosch Photokino GmbhApparatus for intercepting and threading the leader of convoluted motion picture film or the like
US390354127 Jul 19712 Sep 1975Gaisser Jr Eugene JApparatus for processing printing plates precoated on one side only
US394639829 Jun 197023 Mar 1976Silonics, Inc.Method and apparatus for recording with writing fluids and drop projection means therefor
US395904829 Nov 197425 May 1976Stanfield James SApparatus and method for repairing elongated flexible strips having damaged sprocket feed holes along the edge thereof
US402675619 Mar 197631 May 1977Stanfield James SApparatus for repairing elongated flexible strips having damaged sprocket feed holes along the edge thereof
US408157721 Jul 197528 Mar 1978American Hoechst CorporationPulsed spray of fluids
US414210730 Jun 197727 Feb 1979International Business Machines CorporationResist development control system
US421592713 Abr 19795 Ago 1980Scott Paper CompanyLithographic plate processing apparatus
US42499855 Mar 197910 Feb 1981Stanfield James SPressure roller for apparatus useful in repairing sprocket holes on strip material
US426554527 Jul 19795 May 1981Intec CorporationMultiple source laser scanning inspection system
US430146930 Abr 198017 Nov 1981United Technologies CorporationRun length encoder for color raster scanner
US449072915 Sep 198225 Dic 1984The Mead CorporationInk jet printer
US450148015 Oct 198226 Feb 1985Pioneer Electronic CorporationSystem for developing a photo-resist material used as a recording medium
US456428025 Oct 198314 Ene 1986Fujitsu LimitedMethod and apparatus for developing resist film including a movable nozzle arm
US459459820 Oct 198310 Jun 1986Sharp Kabushiki KaishaPrinter head mounting assembly in an ink jet system printer
US46210378 Jul 19854 Nov 1986Sigma CorporationMethod for detecting endpoint of development
US462323631 Oct 198518 Nov 1986Polaroid CorporationPhotographic processing composition applicator
US463330018 Oct 198430 Dic 1986Canon Kabushiki KaishaColor information detecting device
US46368089 Sep 198513 Ene 1987Eastman Kodak CompanyContinuous ink jet printer
US466630714 Ene 198519 May 1987Fuji Photo Film Co., Ltd.Method for calibrating photographic image information
US46707794 Ene 19852 Jun 1987Sharp Kabushiki KaishaColor-picture analyzing apparatus with red-purpose and green-purpose filters
US473622115 Oct 19865 Abr 1988Fuji Photo Film Co., Ltd.Method and device for processing photographic film using atomized liquid processing agents
US474162118 Ago 19863 May 1988Westinghouse Electric Corp.Geometric surface inspection system with dual overlap light stripe generator
US474504017 Feb 198717 May 1988Levine Alfred BMethod for destructive electronic development of photo film
US475584414 Abr 19865 Jul 1988Kabushiki Kaisha ToshibaAutomatic developing device
US477710229 Dic 198711 Oct 1988Levine Alfred BMethod and apparatus for electronic development of color photographic film
US479606113 Nov 19863 Ene 1989Dainippon Screen Mfg. Co., Ltd.Device for detachably attaching a film onto a drum in a drum type picture scanning recording apparatus
US481463029 Jun 198721 Mar 1989Ncr CorporationDocument illuminating apparatus using light sources A, B, and C in periodic arrays
US48211141 May 198711 Abr 1989Dr. Ing. Rudolf Hell GmbhOpto-electronic scanning arrangement
US484555122 May 19864 Jul 1989Fuji Photo Film Co., Ltd.Method for correcting color photographic image data on the basis of calibration data read from a reference film
US485131117 Dic 198725 Jul 1989Texas Instruments IncorporatedProcess for determining photoresist develop time by optical transmission
US485743017 Dic 198715 Ago 1989Texas Instruments IncorporatedProcess and system for determining photoresist development endpoint by effluent analysis
US487506718 Jul 198817 Oct 1989Fuji Photo Film Co., Ltd.Processing apparatus
US495790028 Mar 198818 Sep 1990Semiconductor Energy Laboratory Co., Ltd.Method of manufacturing a superconducting pattern by light irradiation
US496904519 May 19896 Nov 1990Sanyo Electric Co., Ltd.Image sensing apparatus having automatic iris function of automatically adjusting exposure in response to video signal
US499491825 Abr 199019 Feb 1991Bts Broadcast Television Systems GmbhMethod and circuit for the automatic correction of errors in image steadiness during film scanning
US502714631 Ago 198925 Jun 1991Eastman Kodak CompanyProcessing apparatus
US503476726 Ago 198823 Jul 1991Hanetz International Inc.Development system
US507922226 Ago 19887 Ene 1992Semiconductor Energy Laboratory Co., Ltd.Superconducting ceramic circuits and manufacturing method for the same
US509197217 Sep 199025 Feb 1992Eastman Kodak CompanySystem and method for reducing digital image noise
US510128621 Mar 199031 Mar 1992Eastman Kodak CompanyScanning film during the film process for output to a video monitor
US512421631 Jul 199023 Jun 1992At&T Bell LaboratoriesMethod for monitoring photoresist latent images
US51555963 Dic 199013 Oct 1992Eastman Kodak CompanyFilm scanner illumination system having an automatic light control
US519628518 May 199023 Mar 1993Xinix, Inc.Method for control of photoresist develop processes
US520081729 Ago 19916 Abr 1993Xerox CorporationConversion of an RGB color scanner into a colorimetric scanner
US521251229 Nov 199118 May 1993Fuji Photo Film Co., Ltd.Photofinishing system
US52314392 Ago 199127 Jul 1993Fuji Photo Film Co., Ltd.Photographic film handling method
US523535216 Ago 199110 Ago 1993Compaq Computer CorporationHigh density ink jet printhead
US525540811 Feb 199226 Oct 1993Eastman Kodak CompanyPhotographic film cleaner
US52668055 May 199230 Nov 1993International Business Machines CorporationSystem and method for image recovery
US526703017 Ago 199230 Nov 1993Eastman Kodak CompanyMethod and associated apparatus for forming image data metrics which achieve media compatibility for subsequent imaging application
US52926057 Oct 19928 Mar 1994Xinix, Inc.Method for control of photoresist develop processes
US52969239 Ene 199122 Mar 1994Konica CorporationColor image reproducing device and method
US533424725 Jul 19912 Ago 1994Eastman Kodak CompanyCoater design for low flowrate coating applications
US535065116 Jul 199327 Sep 1994Eastman Kodak CompanyMethods for the retrieval and differentiation of blue, green and red exposure records of the same hue from photographic elements containing absorbing interlayers
US535066416 Jul 199327 Sep 1994Eastman Kodak CompanyPhotographic elements for producing blue, green, and red exposure records of the same hue and methods for the retrieval and differentiation of the exposure records
US535730725 Nov 199218 Oct 1994Eastman Kodak CompanyApparatus for processing photosensitive material
US536070119 Abr 19931 Nov 1994Ilford LimitedAntistatic backing for photographic roll film
US537154223 Jun 19926 Dic 1994The United States Of America As Represented By The Secretary Of The NavyDual waveband signal processing system
US539144326 Oct 199221 Feb 1995Eastman Kodak CompanyProcess for the extraction of spectral image records from dye image forming photographic elements
US541477914 Jun 19939 May 1995Eastman Kodak CompanyImage frame detection
US541655011 Sep 199116 May 1995Eastman Kodak CompanyPhotographic processing apparatus
US541811922 Feb 199423 May 1995Eastman Kodak CompanyPhotographic elements for producing blue, green and red exposure records of the same hue
US541859714 Sep 199223 May 1995Eastman Kodak CompanyClamping arrangement for film scanning apparatus
US543257911 Ene 199411 Jul 1995Fuji Photo Film Co., Ltd.Photograph printing system
US543673822 Ene 199225 Jul 1995Eastman Kodak CompanyThree dimensional thermal internegative photographic printing apparatus and method
US544036514 Oct 19938 Ago 1995Eastman Kodak CompanyPhotosensitive material processor
US544781123 Mar 19945 Sep 1995Eastman Kodak CompanyColor image reproduction of scenes with preferential tone mapping
US544838017 Dic 19935 Sep 1995Samsung Electronics Co., Ltd.color image processing method and apparatus for correcting a color signal from an input image device
US545201812 Ago 199419 Sep 1995Sony Electronics Inc.Digital color correction system having gross and fine adjustment modes
US54651558 Jun 19947 Nov 1995International Business Machines CorporationDuplex film scanning
US547734515 Dic 199319 Dic 1995Xerox CorporationApparatus for subsampling chrominance
US54966691 Jul 19935 Mar 1996Interuniversitair Micro-Elektronica Centrum VzwSystem for detecting a latent image using an alignment apparatus
US551660828 Feb 199414 May 1996International Business Machines CorporationMethod for controlling a line dimension arising in photolithographic processes
US55195108 Jun 199421 May 1996International Business Machines CorporationElectronic film development
US554647730 Mar 199313 Ago 1996Klics, Inc.Data compression and decompression
US555056615 Jul 199327 Ago 1996Media Vision, Inc.Video capture expansion card
US555290428 Sep 19943 Sep 1996Samsung Electronics Co., Ltd.Color correction method and apparatus using adaptive region separation
US55637173 Feb 19958 Oct 1996Eastman Kodak CompanyMethod and means for calibration of photographic media using pre-exposed miniature images
US55682709 Dic 199322 Oct 1996Fuji Photo Film Co., Ltd.Image reading apparatus which varies reading time according to image density
US557683628 Oct 199419 Nov 1996Minolta Co., Ltd.Multi-picture image printing system
US55813768 Feb 19963 Dic 1996Xerox CorporationSystem for correcting color images using tetrahedral interpolation over a hexagonal lattice
US55877525 Jun 199524 Dic 1996Eastman Kodak CompanyCamera, system and method for producing composite photographic image
US559641514 Jun 199321 Ene 1997Eastman Kodak CompanyIterative predictor-based detection of image frame locations
US562701629 Feb 19966 May 1997Eastman Kodak CompanyMethod and apparatus for photofinishing photosensitive film
US56415965 Dic 199524 Jun 1997Eastman Kodak CompanyAdjusting film grain properties in digital images
US564926021 Dic 199515 Jul 1997Eastman Kodak CompanyAutomated photofinishing apparatus
US56642534 Abr 19962 Sep 1997Eastman Kodak CompanyStand alone photofinishing apparatus
US566425529 May 19962 Sep 1997Eastman Kodak CompanyPhotographic printing and processing apparatus
US566794422 Abr 199616 Sep 1997Eastman Kodak CompanyDigital process sensitivity correction
US56781164 Abr 199514 Oct 1997Dainippon Screen Mfg. Co., Ltd.Method and apparatus for drying a substrate having a resist film with a miniaturized pattern
TW350183B * Título no disponible
Otras citas
Referencia
1"A Method of Characterisstics Model of a Drop-on-Demand Ink-Jet Device Using an Integral Method Drop Formation Model", Wallace, D., MicroFab Technologies, Inc., The American Society of Mechanical Engineers, Winter Annual Meeting, pp. 1-9, Dec. 10-15, 1989.
2"Adaptive Fourier Threshold Filtering: A Method to Reduce Noise and Incoherent Artifacts in High Resolution Cardiac Images", Doyle, M., et al., 8306 Magnetic Resonance in Medicine 31, No. 5, Baltimore, MD, May, pp. 546-550, 1994.
3"Adaptive-neighborhood filtering of images corrupted by signal-dependent noise", Rangayyan, R., et al., Applied Optics, vol. 37, No. 20, pp. 4477-4487, Jul. 10, 1998.
4"Anisotropic Spectral Magnitude Estimation Filters for Noise Reduction and Image Enhancement", Aich, T., et al., Philips GmbH Research Laboratories, IEEE, pp. 335-338, 1996.
5"Digital Imaging Equipment White Papers", Putting Damaged Film on ICE, www.nikonusa.com/reference/whitepapers/imaging, Nikon Corporation, Nov. 28, 2000.
6"Grayscale Characteristics", The Nature of Color Images, Photographic Negatives, pp. 163-168.
7"Ink-Jet Based Fluid Microdispensing in Biochemical Applications", Wallace, D., MicroFab Technologies, Inc., Laboratory Automation News, vol. 1, No. 5, pp. 6-9, Nov., 1996.
8"Low-Cost Display Assembly and Interconnect Using Ink-Jet Printing Technology", Hayes, D. et al., Display Works '99, MicroFab Technologies, Inc., pp. 1-4, 1999.
9"MicroJet Printing of Solder and Polymers for Multi-Chip Modules and Chip-Scale Package", Hayes, D., et al., MicroFab Technologies, Inc.
10"Parallel Production of Oligonucleotide Arrays Using Membranes and Reagent Jet Printing", Stimpson, D., et al., Research Reports, BioTechniques, vol. 25, No. 5, pp. 886-890, 1998.
11"Protorealistic Ink-Jet Printing Through Dynamic Spot Size Control", Wallace, D., Journal of Imaging Science and Technology, vol. 40, No. 5, pp. 390-395, Sep./Oct. 1996.
Clasificaciones
Clasificación de EE.UU.396/564, 396/604, 430/21, 358/487
Clasificación internacionalH04N1/00, H04N1/04, H04N1/40, H04N1/409, G03D3/00, G03B27/46
Clasificación cooperativaH04N2201/0404, H04N1/00249, H04N1/00795, H04N1/40, H04N2201/0416
Clasificación europeaH04N1/40, H04N1/00C5, H04N1/00H
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